Yes, the denomination is "fun" and it's fun to find when something like this pops up. This coin is a Korean 1902 5 fun. I wasn't really looking seriously and by chance saw this for sale. It wasn't too terribly expensive and I thought what do I have to lose. For some reason I thought it looked different from mine and sure enough, what got me is the font thickness difference in the character "6" for "kwangmu 6th year". It's on the lower right leg. Turns out the original one that I had could be scarcer than I could have thought of. BUT As you might guess, this coin has an interesting rotation error. Rotation error of up to 15 degrees is common but this is pretty unusual. I guess the moral of the story is, just because it's crusty and low grade doesn't necessary mean that it's worthless. You might find something unusual while you are at it.
